22240397 has 2 divisors, whose sum is σ = 22240398. Its totient is φ = 22240396.

The previous prime is 22240391. The next prime is 22240429. The reversal of 22240397 is 79304222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20241001 + 1999396 = 4499^2 + 1414^2 .

It is a cyclic number.

It is not a de Polignac number, because 22240397 - 2⁴ = 22240381 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22240391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11120198 + 11120199.

It is an arithmetic number, because the mean of its divisors is an integer number (11120199).

Almost surely, 2^22240397 is an apocalyptic number.

It is an amenable number.

22240397 is a deficient number, since it is larger than the sum of its proper divisors (1).

22240397 is an equidigital number, since it uses as much as digits as its factorization.

22240397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 22240397 is about 4715.9725402084. The cubic root of 22240397 is about 281.2208468877.

The spelling of 22240397 in words is "twenty-two million, two hundred forty thousand, three hundred ninety-seven".